Question

5. d)I√2-√√3I-I2√3-3√2I-(3√3-4√2)=
6. a)7√3-√12; b)√8+5√2;c)√48-√12;d)√125-√80; e)2√50-2√8; f)2√12+√300
7.a)√8+√32-√50; b)√75+√12-√243;c)√28+√63-5√7 d)3√50+√18-18√2

Answer 1

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6) a- 7√3-√2²·3=7√3-2√3=5√3
  b-√2³+5√2=2√2+5√2=7√2
  c-√2²·2²·3-√2²·3=4√3-2√3=2√3
  d-√5³-√2²·2²·5=5√5-4√5=√5
  e-2√2·5²-2√2³=10√2-4√2=6√2
  f-2√2²·3+√3·10²=4√3+10√3=14√3
7)a-√2³+√2²·2²·2-√2·5²=2√2+4√2-5√2=√2
   b-√3·5²+√2²·3-√3³·3²=5√3+2√3-9√3=-2√3
  c-√2²·7+√3²·7-5√7=2√7+3√7-5√7=0
  d-3√2·5²+√2·3²-18√2=15√2+3√2-18√2=0

Answer 2

5. d) 1√2-√31-12√3-3√21-(3√3-4√2)=
     = 1√2-√31-12√3-3√21-3√3+4√2=
     =5√2-√31-3√21-15√3=